US2312721A - Window screen frame - Google Patents

Description

March 2, 1943. G 2,312,721

WINDOW SCREEN FRAME Filed Oct. 22, 1941 INVENTOR. ALBEET LANG Patented Mar. 2, 1943 WINDOW SCREEN FRAME Albert Lang, Berkeley, Calif, assignor to Roll- Away Window Screen Company, Berkeley, Calif., a corporation of California Application October 22, 1941, Serial No. 416,078

2 Claims. (Cl. 160-381) This invention relates to metallic frames, particularly window screen frames of the type formed of a single strip of material.

It is the principal object of the present invention to provide an improved form of onepiece metallic screen frame offering greatest resistance to frame distortion by screen tension with a minimum of cross sectional area of material, which material, because of its cross sectional shape, is capable of being mitered and bent to form frame corners with adjoining frame sections integrally connected in a manner providing maximum strength without danger of fracture during the bending operation; the cross sectional form of the material keeping a frame formed thereof straight and fiat when applied to a window opening and enabling reinforcing means to be applied to one or more corners thereof without interference with the screen application thereto.

The invention is exemplified in the following description and illustrated by way of example in the accompanying drawing, in which:

Fig. l is a fragmentary view in plan of a onepiece frame formed of my improved frame material.

Fig. 2 is a fragmentary view in perspective and cross section of my improved frame construction.

Fig. 3 is a similar view showing the manner of forming a frame corner.

Fig. 4 is a fragmentary view in plan showing the manner of mitering the material to form a corner.

Fig. 5 is a view similar to Fig. 3 except that it discloses the manner of connecting the ends of the frame.

Fig. 6 is a fragmentary view in plan showing one manner of connecting the frame ends.

Fig. '7 is a view in cross section showing a slightly modified form of the frame.

Referring more particularly to the accompanying drawing, l indicates a one-piece strip frame for screen fabric. The novelty in the frame resides in the improved formation of the strip material of which the frame is constructed.

The strip material is folded longitudinally by any preferred method such as rolling or extrusion to form a channel base H having integral channel side legs [2 and M which are parallel and at right angles to the channel base II.

The end of the inner leg i2 is folded upon itself as at I for strength and rigidity. The end of the other or outer leg I4 is integrally connected to a web ll which extends laterally outward in a plane parallel to the channel base ll.

At its outer edge the web IT is integrally connected with one toe N5 of an angle section l9,

which toe l8 extends in a plane parallel to the leg M of the channel but in an opposite direction with relation to the web. The other toe 20 of the angle section 19 extends laterally outward in a plane parallel to the web- H. The toes l8 and 20 of the angle section l9 are comparatively narrow as is illustrated in Figs. 2 and 3. The toe 20 may be bent back upon itself, as shown in Fig. 7, for additional rigidity if desired.

To bend the strip material to form a framecorner, it is mitered as illustrated in Fig. 4, the miter out having its apex at the junction of the toe l8 of the angle section and the web 11. The cross sectional shape and dimensions of the angle section l9 enables the necessary right angle bend to be made without any danger of fracturing. At the same time the integral tie between the two sections of the frame will be strong and rigid.

If the ends of the strip material forming the frame are mitered and join at a corner, a flat connector 2|, such as shown in Fig. 5, may be employed to connect the ends. If the ends join intermediate a corner, a connector 22, such as shown in Fig. 6, may be used. In either instance the connector may be spot welded to the strip material. The comparatively wide web I! and its position between the channel and the angle sections enables such ties or connectors to be used or the corners reinforced by members such as 2| without interfering with the application of the wire fabric or the ability of the frame to lie fiat.

When the frame is formed, the wire fabric 23 is stretched thereover and clamped thereto by means of a spline 24 pressed into the channel section as shown. The spline 24 is usually in one piece.

My improved one-piece strip frame, due to its cross sectional configuration, offers adequate resistance to lateral distortion and twist due to tension of the wire fabric with but a small cross sectional area of material. This insures that the screen frame will lie fiat at all times which is important.

The lateral overall width of the strip material is comparatively narrow so as to insure a maximum light opening.

The narrow toed angle section at the outer edge of the frame forms a rigid strong tie which may be bent to form corners without fracturing and also stifiens the outer frame edge so that it will lieperfectly flat.

The width of the web 11 and its position en- Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. A one-piece metal strip frame for a screen fabric, the frame including a channel for recepan integral web extending laterally outward from the toe of the outermost leg of the channel and in a plane parallel to the base of the channel,

and a comparatively small integral angle section integral with the web at the outer edge of the latter with one toe extending in a plane parallel 15 tion of the marginal edge of fabric and a spline,

to the legs of the channel but opposite therefrom, the second toe of the angle extending laterally outward from the outer edge of the other in a plane parallel to that of the Web, the frame being miter-cut to form the corners, the apex of the miter-cut being at the junction of the web and angle section, the angle being bent thereat in forming the frame, and connecting means for the adjoining ends of the frame.

2. As an article of manufacture, a strip material for forming a one-piece frame for screen fabric, said material being folded longitudinally to form a channel base and channel side legs,

a lateral web integral with and extending laterally outward from the end of one channel side leg in a plane parallel to the channel base, said web bent at its outer edge right angularly to extend oppositely with respect to the channel leg and then laterally outward in a plane parallel to said web forming a comparatively small angle section at the outer edge of said Web.

ALBERT LANG.

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